Mencken recognized the fallacy of enforcing morality but not theology (“thou shalt have no other gods before me”):
It is moral tyranny that now afflicts These States, and the worst of the matter is that thousands of Americans seem disposed to submit to it without protest.. If theological tyranny were revived tomorrow, they would loose a bellow loud enough to shake the earth, but in the face of moral tyranny they remain silent and sit still. Thus it is that militant moralists, moved by that will to power which is universal in man, have proceeded from excess to excess, until now an almost endless roll of wholly harmless acts is under the ban of the law.
It is unlawful in Baltimore for a citizen to hear Beethoven’s Fifth Symphony on the Sabbath. It is unlawful for him to buy a cigar. It is unlawful for him to have his hair cut. It is unlawful for him, on a summer Sunday, to recreate himself by playing baseball. In various large areas of his city he is forbidden to buy a bottle of wine, even on a week-day. Many plays that he may want to see, indubitable works of art, are barred from the theatres he patronizes. He is forbidden to possess certain great and valuable books, or to send them to his friends by mail. The law decides what games of chance he shall play and what games of chance he shall not play, and the division is purely arbitrary and nonsensical.
What is more, this invasion of his common rights is still going on. Here in Baltimore there are half a dozen organizations devoted exclusively to the concoction and prohibition of new and wholly artificial crimes. And in Washington the Congress of the United States is preparing to pass a law making it a crime for a man to have a bottle of beer in his possession–not to sell it or give it away, remember, but merely to have it.
What is the theory at the bottom of all this oppressive and intolerable legislation? Simply the theory that no man shall do, even in his own house, anything which the majority of his fellow-citizens do not care to do in their houses. His act need not be vicious in itself; it need not be dangerous; it need not be disturbing to his neighbors. All it need be is abhorrent to the opinion of those neighbors, or, to be more exact, to the opinion of 51 per cent. of them. This is the theory at the bottom of moral snouting and moral legislation, and this was also the theory at the bottom of the hanging of Jews and Quakers, the Massacre of St. Bartholomew and the Inquisition in Spain.
No sane man, I take it, objects to laws necessary to the public security, even when they limit his own liberties. I have never heard anyone defend burglary, or arson, or rape. I doubt that any such defense has ever been made in Christendom. But is it necessary to the public security that boys who work hard all week be forbidden to take reasonable recreation on Sunday? Is it necessary to the public security that a sane man, fully competent to take care of himself, be forbidden to drink a bottle of beer? Is it necessary to the public security that a good citizen be forbidden to hear Beethoven’s Fifth Symphony one day out of every seven, or that he be forbidden to read the books he wants to read, or to see the plays be wants to see?
I think not. On the contrary, it seems to me that such prohibitions are wholly intolerable and indecent. It seems to me that any person who essays to enforce them upon free citizens is a far more dangerous criminal than that poor wretch who essays to pick their pockets. The pickpocket steals only a watch, and a man without a watch is still a man. But the militant moralist tries to steal liberty and self-respect, and the man who has lost both is a man who has lost everything that separates a civilized freeman from a convict in a chain-gang.
So again the question: why do Christians expect non-Christians to behave like Christians?